察汗乌苏面板坝监测资料分析  

Stress and deformation analysis of Chahanwusu concrete face rockfill dam(CFRD) based on monitoring data

作　　者：李为[1] 苗喆[2] 

机构地区：[1]南京水利科学研究院,江苏南京210029 [2]中国水电顾问集团西北勘测设计研究院,陕西西安710065

出　　处：《水利水运工程学报》2012年第5期30-35,共6页Hydro-Science and Engineering

基　　金：国家重点实验室基本科研业务费项目:土石坝深厚覆盖层地基力学参数确定技术研究

摘　　要：建在深厚覆盖层上的混凝土面板堆石坝受力情况比较复杂,采用模型试验方法研究其应力变形规律与实际情况存在差异,因此,有必要对已经投入运行的覆盖层面板坝的原型观测资料进行整理和分析.通过对察汗乌苏面板坝安全监测资料的分析,了解了该坝的应力变形性状.察汗乌苏面板坝水平位移和沉降均较小;面板垂直缝变位小,无脱空现象发生,面板底部局部弯曲变形偏大;防渗墙在蓄水期向下游产生挠度变形,且墙体上部变形量大于下部;周边缝最大三向变位发生在岸坡,小于设计允许值;大坝的应力变形都在设计允许范围内,各测点测值已基本趋于稳定,说明在工程特性较好的覆盖层上建高面板坝是可行的.On account of complex force conditions of concrete face rockfill dams（CFRD） built on deep overburdens,and the results of centrifugal or numerical experiments usually being somewhat different from the real situation,it is necessary to collate and analyse the monitoring data of dams that have been put into operation.The stress and deformation characteristics of Chahanwusu CFRD are recognised by analysing the monitoring data.Since the main rockfill zone is filled with gravel soil,both horizontal displacement and settlement are not great.The vertical joints displacement is very small and there is a little interspace between the face slab and the cushion layer,but the bending of the bottom area of the face slab is relatively large.Downstream deflection occurs on the cutoff wall during impoundment,and the deflection of the upper part of the cutoff wall is larger than the deflection of its lower part.The maximum displacement of perimeter joints which occur in the abutment instead of in the riverbed is smaller than the allowable value.The stress and the deformation of the dam both fall within the allowable range and the measured values have been stabilized,which indicates that it is feasible to construct high CFRD on deep overburdens of good engineering properties.

关 键 词：混凝土面板堆石坝 深覆盖层 安全监测 应力变形 

分 类 号：TV641.43[水利工程—水利水电工程] TV698.11